My wife uses http://www.blogherads.com/ to display ads on her site, and it pays (in her case) about 4X what she gets from adsense. It is focussed on blogs for women, and you have to be approved for it. Which means that the blogs you are targeting are of higher than average quality. 'Course there are other ways to do it. Like an adwords campaign using "my blog" as a keyword and running it on the content network. Good luck.
You could try PPC. You might also look into advertising on other extremely popular internet marketing blogs like Shoemoney or something.
Adwords is still king for getting targetted traffic the quickest. You can even select speciffic weebsites to place your ads on that are their network. Basically any site you see with Google advertising on it you can set your advertising to apear on and you can usually get more targetted clicks at a lower cost per click.
I take it you dont have a e-mail list? so advertise on some of the popular blogs as well as your own and maybe even try a few ezine ads for bloggers